There are 18 balls in a bag. four balls are while and rest are blue and red. a ball is drawn from the bag. the probablity of not drawing a blue ball is 2/3. what is the ratio between the number of red balls and blue balls... Is you know then Plz answer this question soon.
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bag contains =18 balls
no. of red balls =x
Probability of red ball =
total no of ball
Favourable ball
(i) P[red ball]=
18
x
(ii) If two more red ball add
no. of red ball =x+2
total no. of balls =18+2=20
Probability of druuing red ball =
8
9
Probability of red ball coming in part (i)
∴
20
x+2
=
8
9
×
18
x
∴
20
x+2
=
16
x
∴ 16(x+2)=20 x
∴ 16 x+32=20 x
∴ 20 x−16 x=32
∴ 4 x=32
∴ x=8
→ the value of x=8
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